concave plane

• 凹底刨,凹平面

concave plane的用法和样例：

例句

1. The fabrication of plane refractive microlens arrays, for instance using the coating technique on the concave microlens plate, is discussed.
   探讨了在凹微透镜器件制作基础上利用成膜工艺开展平面折射微透镜器件制作的问题。